Coordinate detecting apparatus having acceleration detectors
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United States of America Patent
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Dec 24, 1996
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N/A
app pub date -
Jan 21, 1993
filing date -
Jan 24, 1992
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Abstract
A coordinate input device includes a coordinate detector which may include an acceleration detector for accurate determination of the spatial coordinates of a coordinate indicator. A three-dimensional acceleration in a first coordinate system is detected by a first acceleration detecting unit and is converted into an input coordinate system in accordance with the attitude of the coordinate indicator. The effect of gravity is removed and the acceleration is integrated to obtain the spatial coordinates of the coordinate indicator. Even if the coordinate indicator is tilted, accurate coordinate input can be performed.
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